This paper presents a multi-objective Particle Swarm Optimization (PSO) algorithm for worker assignment and mixed-model assembly line balancing problem when task times depend on the worker’s skill level. The objectives of this model are minimization of the number of stations (equivalent to the maximization of the weighted line efficiency), minimization of the weighted smoothness index and minim...

AIMS To determine the relation between sick leave and selected exposure variables among women semiconductor workers. METHODS This was a cross sectional survey of production workers from 18 semiconductor factories. Those selected had to be women, direct production operators up to the level of line leader, and Malaysian citizens. Sick leave and exposure to physical and chemical hazards were det...

For this costumer placed in Belfast, UK, simulation has been used to investigate the manufacturing process, to evaluate bottlenecks and to prepare the background for simulation based, in-line scheduling. The actual problem at the shop floor deals with synchronizing work flows and optimizing production in conjunction with customer orders . Over 1700 different kinds of orders can be manufactured ...

For this costumer placed in Belfast, UK, simulation has been used to investigate the manufacturing process, to evaluate bottlenecks and to prepare the background for simulation based, in-line scheduling. The actual problem at the shop floor deals with synchronizing work flows and optimizing production in conjunction with customer orders . Over 1700 different kinds of orders can be manufactured ...

T his volume describes changes in the workplace for Americans who do not earn enough to support themselves and their families. The number of such workers is substantial. In 2001 about 34 million Americans, 23.9 percent of the labor force, earned less than $8.70 an hour (Mishel, Bernstein, and Boushey 2003, table 2.9). Working full-time for the entire year at this wage produces annual earnings o...

abstract   background : noise is the most common hazard in the workplace and noise induced hearing loss considered to be the most common occupational disease as well. cigarette smoking, in some studies, has been known to induce hearing loss. the purpose of this study was to evaluate the effect of contemporary exposure to occupational noise and cigarette smoking on hearing.   methods : 478 assem...

Line balancing is an effective tool to improve the throughput of assembly line while reducing nonvalue-added activities, cycle time. LB is the problem of assigning operation to workstation along an assembly line, in such a way that assignment is optimal in some sense. This paper mainly focuses on improving overall efficiency of single model assembly line by reducing the non value added activiti...